The reason of wall cracks is analyzed, the standard problems of crack width are stated and the preventive methods and measures in the design and construction are presented for reference.
本文分析了墙体裂缝的产生原因，阐述了裂缝宽度的标准问题，并提出了在设计、施工中相应采取的防治方法和措施，供大家参考。
The natural frequencies of beam are calculated with finite element method in the cases of different crack width and different crack depth.
本文利用有限元法分别计算在不同的裂纹深度、不同的裂纹开口宽度的情况下梁的固有频率。
Then, the strength of the structure and crack width are checked by using the nonlinear FEM.
然后以考虑混凝土开裂的非线性有限元方法校核结构强度和裂缝宽度。
The creep and shrinkage of concrete is the major problem that leads to the enlargement of crack width in concrete structures, under the action of long-term load.
混凝土的徐变和收缩是长期荷载作用下混凝土结构裂缝宽度扩大的主要影响因素。
The deflection and the crack width of the SRC transfer girder are calculated.
验算钢骨混凝土转换梁的挠度和裂缝宽度。
The test results show that steel fiber reinforced self-stressing concrete could decrease the crack width of penstocks effectively.
试验表明，利用钢纤维和自应力混凝土可以有效地降低管道外包混凝土的裂缝宽度。
Based on standard test method ASTM C1550 for fibre reinforced concrete (FRC), a modified round panel test method for the material performance of FRC by measuring crack opening width is presented.
在美国材料试验协会标准ASTMC1550圆板试验方法基础上，提出一种改进的基于裂缝宽度量测技术的纤维混凝土(FRC)材料静定圆板试验方法。
In this paper, according to the experimental results of 22 beams, we probe into the influence of concrete cover thickness on crack width and crack spacing.
本文通过22根钢筋混凝土受弯构件的试验，探讨了混凝土保护层厚度对裂缝间距和裂缝宽度的影响。
My work can be summarized as follows: (1) According to the characteristics of crack on concrete structure, I realize the width measurement algorithm.
本文主要完成以下工作：1根据混凝土结构裂缝图像的特点，实现了混凝土结构裂缝宽度的测量算法。
It shows that finite element analysis could replace experiments to study the crack width of reinforced concrete beams in a way.
说明有限元分析在某种程度上可以代替试验对钢筋混凝土梁裂缝宽度进行研究分析。
Based on meeting the requirements of flexural strength, the effects made by ratio of longitudinal reinforcement on deflection and maximum value of crack width are analyzed.
在满足正截面承载力要求的基础上，分析了纵向配筋率的变化对挠度及最大裂缝宽度的影响。
However, the evaluating results of statistical method are the static results reflecting the present conditions of CRCP crack width, and influenced remarkably by the individual wider cracks.
而统计方法的评价结果受个别较宽裂缝的影响较大，且为静态结果，只能反映CRCP裂缝宽度的现时状况。
Crack width is a most significant parameter for the durability assessment and design of reinforced concrete structures.
锈胀裂缝宽度是混凝土结构耐久性与设计评估的重要参数。
Comparisons between theoretical predictions and experimental results, in terms of crack spacing and crack width, indicate that the proposed model is reasonable.
文中对裂缝间距和裂缝宽度的模型预测结果和试验结果进行了比较，对比结果表明文中提出的计算模型是合理的。
According to the test results and theoretical analyses, a method of calculating the crack width of unbonded partially prestressed concrete beams is presented.
在试验和理论分析的墓础上，提出了无粘结部分预应力混凝土梁裂缝宽度的计算方法。
Then, a study on the accuracy of these formulas for calculating crack width is made on the basis of the existing test date obtained from flexural members.
此外，根据国内外大量的受弯构件裂缝宽度试验数据，对这些裂缝宽度计算公式的精度进行了计算和比较研究。
The polypropylene fiber can effectively control the length, width and number of the drying shrinkage crack of early-age concrete.
聚丙烯纤维可有效控制混凝土早期干缩裂缝的长度、宽度和数量。
The formula in Code for design of concrete structures (GB50010-2002) can used to estimate the width of crack.
可用《混凝土结构设计规范》（GB50010-2002）的公式估计其裂缝宽度，安全性高。
The results are shown that reliability level of the members are sufficient, the guaranteed reliability is higher using the calculating formulas of characteristic crack width of current design codes.
计算结果说明，无粘结部分混凝土构件的正常使用极限状态下的可靠性提高，设计规范的“特征裂缝宽度”计算公式有较高的可靠保证。
The static load test was done on the frame beam strengthened by CFRP with frame joint anchored in different mode, and the bearing capacity, deflection and width of crack was surveyed.
对采用不同梁端锚固方式的碳纤维布加固框架梁进行静载试验研究，在承载力、挠度及裂缝开展等方面进行了综合比较和分析。
Whether the HRB400 steel bars reinforced concrete beams can be met the limit of the maximum crack width and the limit of deflection is discussed.
讨论了正常使用极限状态下，HRB400级钢筋混凝土梁的裂缝宽度和挠度能否满足规范限值要求。
In addition, the calculating methods about the gap of the connectors and the maximum width of crack are discussed in the thesis.
另外，作者对组合梁剪力连接件的设计理论及组合梁最大裂缝宽度计算方法作了逐一地探讨。
Based on the standard computation formula of cracks, the maximum crack width of RC member with 0.8% steel fiber (by volume) is about 32% lower than that of RC member.
经过计算，纤维体积率为0.8%的钢纤维混凝土能使混凝土结构裂缝的最大宽度降低32%。
The width measurement of the main crack The width measurement is based on the skeleton and continuous boundary of crack.
裂缝的宽度测量裂缝宽度测量是建立在对裂缝的骨架和边缘提取基础上。
Ultimate strength design is not required and the reinforcement can be determined only on basis of allowable crack width in design of beam on foundation.
地基梁可不进行承载能力极限状态的计算，其配筋可由正常使用极限状态中的允许裂缝宽度来确定。
The width and depth of the widest crack increase with the increase of the length of the wall.
最大裂缝宽度和深度随着墙体长度的增大而增大。
By the analysis of average crack spacing, the maximum cracks width, crack height of the reinforced beams. derived a maximum crack width formula for the reinforced beam.
通过对加固梁平均裂缝间距、最大裂缝宽度、裂缝高度等的分析，推导出了加固梁最大裂缝宽度计算公式。
The direction, length, average and maximum width of crack can be found out in any concrete crack image.
对于混凝土裂纹图像，算法能够找出裂纹的走向、长度、平均宽度和最大宽度。
Established the calculation model of waterproof layer tensile above bridge crack, compute a minimum extension and strength the waterproofing layer must have hi a certain width crack.
建立了桥面裂缝之上防水层张力的计算模型，有效地计算出桥面混凝土一定宽度裂缝上防水层须具备的最小延伸率和拉伸强度。
I research on two methods of crack width calculating, one is through the center line and left-right edges, the other only through left-right edges, and make the latter as the method of this project.
对由中心线和左右边缘求裂缝宽度和由左右边缘求裂缝宽度两种方法进行了研究，采用后者作为本课题的计算方法。
应用推荐